202440421 has 8 divisors (see below), whose sum is σ = 217630080. Its totient is φ = 187704288.

The previous prime is 202440389. The next prime is 202440449. The reversal of 202440421 is 124044202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202440421 - 2⁵ = 202440389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202440481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112456 + ... + 114241.

It is an arithmetic number, because the mean of its divisors is an integer number (27203760).

Almost surely, 2^202440421 is an apocalyptic number.

It is an amenable number.

202440421 is a deficient number, since it is larger than the sum of its proper divisors (15189659).

202440421 is a wasteful number, since it uses less digits than its factorization.

202440421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226763.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 202440421 is about 14228.1559240824. The cubic root of 202440421 is about 587.1725494401.

Adding to 202440421 its reverse (124044202), we get a palindrome (326484623).

The spelling of 202440421 in words is "two hundred two million, four hundred forty thousand, four hundred twenty-one".